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Purpose <p>To investigate postoperative demarcation lines using en-face optical coherence tomography (OCT) after pars plana vitrectomy (PPV) for primary rhegmatogenous retinal detachment (RRD) and assess association with visual outcomes.</p> Methods <p>Consecutive patients undergoing PPV for primary RRD with gas tamponade were prospectively enrolled. Postoperative demarcation lines on en-face OCT were defined as hyper-reflective lines following contour of previous detachment edge. Postoperative best-corrected visual acuity (BCVA) and metamorphopsia were analyzed in relation to location of demarcation lines (within the central 3-mm ETDRS zone vs. between 3 and 6&#xa0;mm). A control group of patients treated with silicone oil (SO) was included for comparison.</p> Results <p>A total of 31 eyes met inclusion criteria. En-face OCT identified postoperative demarcation lines in 30 eyes (96.7%). None were seen in 25 eyes after SO removal (<i>p</i> &lt; 0.001). Ellipsoid zone (EZ) disruption at demarcation line was found in 21 eyes, persistent subretinal fluid (SRF) in 6 eyes, and outer retinal folds (ORF) in 3 eyes. Eyes with persistent SRF had longer interval between symptom onset and surgery compared with those showing EZ disruption or ORF (<i>p</i> = 0.025). Demarcation lines within central 3-mm ETDRS zone were significantly associated with greater horizontal metamorphopsia (B = 0.232, <i>p</i> = 0.003), whereas no significant association was found with postoperative BCVA (B = − 0.094, <i>p</i> = 0.280).</p> Conclusions <p>En face OCT accurately detects postoperative demarcation lines, which may represent a previously overlooked factor influencing visual dysfunction after PPV for RRD with gas tamponade.</p>

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Postoperative demarcation lines in rhegmatogenous retinal detachment: what en-face imaging reveals about visual outcomes

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月27日

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  • Nicola Valsecchi,
  • Lorenzo Padovani,
  • Claudio Scardovelli Fava,
  • Alessandro Finzi,
  • Antonio Moramarco,
  • Roberto dell’Omo,
  • Luigi Fontana,
  • Maurizio Mete

摘要

Purpose

To investigate postoperative demarcation lines using en-face optical coherence tomography (OCT) after pars plana vitrectomy (PPV) for primary rhegmatogenous retinal detachment (RRD) and assess association with visual outcomes.

Methods

Consecutive patients undergoing PPV for primary RRD with gas tamponade were prospectively enrolled. Postoperative demarcation lines on en-face OCT were defined as hyper-reflective lines following contour of previous detachment edge. Postoperative best-corrected visual acuity (BCVA) and metamorphopsia were analyzed in relation to location of demarcation lines (within the central 3-mm ETDRS zone vs. between 3 and 6 mm). A control group of patients treated with silicone oil (SO) was included for comparison.

Results

A total of 31 eyes met inclusion criteria. En-face OCT identified postoperative demarcation lines in 30 eyes (96.7%). None were seen in 25 eyes after SO removal (p < 0.001). Ellipsoid zone (EZ) disruption at demarcation line was found in 21 eyes, persistent subretinal fluid (SRF) in 6 eyes, and outer retinal folds (ORF) in 3 eyes. Eyes with persistent SRF had longer interval between symptom onset and surgery compared with those showing EZ disruption or ORF (p = 0.025). Demarcation lines within central 3-mm ETDRS zone were significantly associated with greater horizontal metamorphopsia (B = 0.232, p = 0.003), whereas no significant association was found with postoperative BCVA (B = − 0.094, p = 0.280).

Conclusions

En face OCT accurately detects postoperative demarcation lines, which may represent a previously overlooked factor influencing visual dysfunction after PPV for RRD with gas tamponade.